Bug 2161855 (CVE-2021-32837) - CVE-2021-32837 mechanize: Regular Expression Denial of Service
Summary: CVE-2021-32837 mechanize: Regular Expression Denial of Service
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-32837
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2161856
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-01-18 05:16 UTC by Avinash Hanwate
Modified: 2023-01-21 12:52 UTC (History)
0 users

Fixed In Version:
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Last Closed: 2023-01-21 12:52:08 UTC
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Description Avinash Hanwate 2023-01-18 05:16:00 UTC 
mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.

https://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize/
https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6
https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879
https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6
Comment 1 Avinash Hanwate 2023-01-18 05:16:19 UTC 
Created python-mechanize tracking bugs for this issue:

Affects: fedora-all [bug 2161856]
Comment 2 Product Security DevOps Team 2023-01-21 12:52:07 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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